1 Land contracts or contracts for deed are a security agreement between a seller, called a Vendor, and a buyer, called a Vendee.  The Vendor agrees to sell a property by financing the purchase for the Vendee.
The two DNA strands are held together by interchain hydrogen bonds. H-bonds pair the bases in one chain to the complementary bases in the other chain. (A/T and G/C).
How are nucleotides held together vs how DNA strands in a DNA molecule are held together? The nucleotides are linked together covalently by phosphodiester bonds through the 3'-OH group of one sugar and the 5'-PO3 of the next, into polynucleotide chains. A DNA molecule is composed of two of these polynucleotide chains (DNA strands) which are held together by hydrogen bonds between the paired bases. DNA is wound into a _______ _______.